80-3=X

Solution for 80-3=X equation:

Simplifying
80 + -3 = X

Combine like terms: 80 + -3 = 77
77 = X

Solving
77 = X

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '-1X' to each side of the equation.
77 + -1X = X + -1X

Combine like terms: X + -1X = 0
77 + -1X = 0

Add '-77' to each side of the equation.
77 + -77 + -1X = 0 + -77

Combine like terms: 77 + -77 = 0
0 + -1X = 0 + -77
-1X = 0 + -77

Combine like terms: 0 + -77 = -77
-1X = -77

Divide each side by '-1'.
X = 77

Simplifying
X = 77